Hard Crash on OS X and Linux (but somewhat environment dependent)

[Stefan Marr]

Hi:

In one of my experiments, I got a hard crash of the Graal VM.
Error below.

The error is somewhat dependent on either environment or for instance whether -ea and/or -esa are passed to the VM.
Though, I haven’t managed to find a way to avoid crashes reliably.

To reproduced, you’ll need with a little API change (see patch below) or my version of GraalVM.

git clone https://github.com/smarr/GraalVM.git
cd GraalVM
./mx.sh --vm server build -p
cd ../
git clone -b mt-vs-pe/without-control-specialization https://github.com/smarr/TruffleSOM.git
cd TruffleSOM
ant
../GraalVM/mxtool/mx --vm server vm -Xbootclasspath/a:build/classes som.vm.Universe -cp Smalltalk:Examples/Benchmarks/DeltaBlue Examples/Benchmarks/BenchmarkHarness.som  DeltaBlue  1500 0 6000

Best regards
Stefan


#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x000000010d601e5b, pid=68949, tid=4867
#
# JRE version: Java(TM) SE Runtime Environment (8.0_20-b26) (build 1.8.0_20-b26)
# Java VM: OpenJDK 64-Bit Server VM (25.25-b02-internal-graal-unknown-venus-2-2014-12-09_22-44-20_CET mixed mode bsd-amd64 compressed oops)
# Problematic frame:
# J 7192 Graal com.oracle.graal.truffle.OptimizedCallTarget.callRoot([Ljava/lang/Object;)Ljava/lang/Object; (191 bytes) @ 0x000000010d601e5b [0x000000010d601e20+0x3b]
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /Users/smarr/Projects/PostDoc/Truffle/som/hs_err_pid68949.log
Loaded disassembler from /Users/smarr/Projects/PostDoc/Truffle/graal/jdk1.8.0_20/product/jre/lib/hsdis-amd64.dylib
Compiled method (Graal)   12445 7192       4       com.oracle.graal.truffle.OptimizedCallTarget::callRoot (191 bytes)
 total in heap  [0x000000010d601cd0,0x000000010d601f50] = 640
 relocation     [0x000000010d601e08,0x000000010d601e20] = 24
 main code      [0x000000010d601e20,0x000000010d601edd] = 189
 stub code      [0x000000010d601edd,0x000000010d601ee0] = 3
 oops           [0x000000010d601ee0,0x000000010d601ef8] = 24
 metadata       [0x000000010d601ef8,0x000000010d601f00] = 8
 scopes data    [0x000000010d601f00,0x000000010d601f18] = 24
 scopes pcs     [0x000000010d601f18,0x000000010d601f48] = 48
 dependencies   [0x000000010d601f48,0x000000010d601f50] = 8
Compiled method (c2)   12445 2114       4       com.oracle.graal.truffle.OptimizedCallTarget::doInvoke (6 bytes)
 total in heap  [0x000000010c77b910,0x000000010c77bb58] = 584
 relocation     [0x000000010c77ba48,0x000000010c77ba60] = 24
 main code      [0x000000010c77ba60,0x000000010c77bac0] = 96
 stub code      [0x000000010c77bac0,0x000000010c77bae8] = 40
 oops           [0x000000010c77bae8,0x000000010c77baf0] = 8
 metadata       [0x000000010c77baf0,0x000000010c77baf8] = 8
 scopes data    [0x000000010c77baf8,0x000000010c77bb08] = 16
 scopes pcs     [0x000000010c77bb08,0x000000010c77bb38] = 48
 dependencies   [0x000000010c77bb38,0x000000010c77bb40] = 8
 handler table  [0x000000010c77bb40,0x000000010c77bb58] = 24


diff --git a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/OptimizedCallTarget.java b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/OptimizedCallTarget.java
index 8d00194..0670fad 100644
--- a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/OptimizedCallTarget.java
+++ b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/OptimizedCallTarget.java
@@ -104,7 +104,7 @@ public class OptimizedCallTarget extends InstalledCode implements RootCallTarget
         if (root == null || !root.isCloningAllowed()) {
             return null;
         }
-        return NodeUtil.cloneNode(root);
+        return root.cloneRootNode();
     }
 
     public Assumption getNodeRewritingAssumption() {
diff --git a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.java b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.java
index aebf748..2552eea 100644
--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.java
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.java
@@ -79,6 +79,10 @@ public abstract class RootNode extends Node {
         return false;
     }
 
+    public RootNode cloneRootNode() {
+        return NodeUtil.cloneNode(this);
+    }
+
     /**
      * Reports the execution count of a loop that is a child of this node. The optimization
      * heuristics can use the loop count to guide compilation and inlining.



-- 
Stefan Marr
INRIA Lille - Nord Europe
http://stefan-marr.de/research/